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fix: ensure MCP and skills config changes are immediately reflected

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- Use ExtensionsConfig.from_file() instead of cached config to always
  read latest configuration from disk in LangGraph Server
- Add mtime-based cache invalidation for MCP tools to detect config
  file changes made through Gateway API
- Call reload_extensions_config() in Gateway API after updates to
  refresh the global cache
- Remove unnecessary MCP initialization from Gateway startup since
  MCP tools are only used by LangGraph Server

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
hetaoBackend
2026-01-25 22:37:53 +08:00
parent f629e134d4
commit 139063283f
7 changed files with 89 additions and 29 deletions
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8
backend/src/mcp/tools.py
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@@ -4,7 +4,7 @@ import logging
from langchain_core.tools import BaseTool
from src.config.extensions_config import get_extensions_config
from src.config.extensions_config import ExtensionsConfig
from src.mcp.client import build_servers_config
logger = logging.getLogger(__name__)
@@ -22,7 +22,11 @@ async def get_mcp_tools() -> list[BaseTool]:
logger.warning("langchain-mcp-adapters not installed. Install it to enable MCP tools: pip install langchain-mcp-adapters")
return []
extensions_config = get_extensions_config()
# NOTE: We use ExtensionsConfig.from_file() instead of get_extensions_config()
# to always read the latest configuration from disk. This ensures that changes
# made through the Gateway API (which runs in a separate process) are immediately
# reflected when initializing MCP tools.
extensions_config = ExtensionsConfig.from_file()
servers_config = build_servers_config(extensions_config)
if not servers_config: